Convert NavigationView to Fragment (1/2)

- Replace NavigationView with DrawerFragment
- Load groups and filters in DrawerFragment, rather than in
  PeopleActivity directly
- based on RecylcerView, which seems more future-proof
- LTR layout and A11Y is handled
- new badge is implemented
- menu selection is implemented

Bug: 34062530

Test: quick sanity check

Change-Id: I630978e64dc4fd386e25cedfd04f53ea2bd8679f
diff --git a/res/values/colors.xml b/res/values/colors.xml
index d5f2da3..e89ed9f 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -241,4 +241,17 @@
 
     <!-- Background color for sync-off alert. -->
     <color name="alert_background">#e0e0e0</color>
+
+    <!-- Divider color in navigation drawer -->
+    <color name="drawer_divider_color">#E5E5E5</color>
+
+    <!-- Background color for the navigation drawer -->
+    <color name="navigation_drawer_background_color">#FAFAFA</color>
+
+    <!-- Background color for the current selected item in the navigation drawer -->
+    <color name="drawer_selected_color">#E8E8E8</color>
+
+    <!-- Highlight color used in places such as ripples -->
+    <color name="control_highlight_color">#1A000000</color>
+
 </resources>